×

Blood pressure measuring appliance

  • US 4,907,596 A
  • Filed: 09/23/1986
  • Issued: 03/13/1990
  • Est. Priority Date: 09/23/1985
  • Status: Expired due to Term
First Claim
Patent Images

1. A blood pressure measuring appliance comprising:

  • (a) a pulse beat detector for detecting arterial pulse beats, the pulse beat detector comprising an active sensor having a measuring signal transmitter connected to an impulse generator having an impulse frequency selected to be equal to an integral multiple greater than or equal to twice a line voltage frequency, delivering a measuring signal of impulse form and two measuring signal receivers spaced from one another and from the measuring signal transmitter, which respond to the measuring signal in dependence upon the pulse beat, and wherein the measuring signal receivers are coupled to a selector circuit which is responsive to signal amplitudes of the received measuring signals;

    (b) an ECG signal detector having at least two ECG electrodes for determination of ECG signals, and an evaluation circuit selectively responding to ECG signal peaks of a predetermined type and amplifying the ECG signals of the ECG electrodes, the ECG electrodes being contactable to skin;

    (c) a time measuring means for determination of time intervals between a predetermined ECG signal peak acquired by the ECG signal detector and the pulse beats acquired by the pulse beat detector, respectively, following the predetermined peak, the selector circuit delivering the received measuring signal having a greater of the signal amplitudes in each case for controlling said time measuring means;

    (d) a blood pressure display means for displaying the duration of time interval determined by the time measuring means as blood pressure information;

    (e) a signal transmission arrangement optically coupling the evaluation circuit of the ECG signal detector with the time measuring means;

    (f) a first operational voltage source supplying exclusively the ECG signal detector including the optical signal transmission arrangement; and

    (g) a second operational voltage source supplying the remaining components of the blood pressure measuring appliance independent of the first operational voltage source.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×